Detachable chair bottom



K Oct. i951 SATTERFIELD 7 DETACHABLE CHAIR BOTTOM Filed Feb. 1, 1950 2 Sheets-Sheet l Inventor 4 Isaac Salierflb/d myway 3m Fig. 2 By Oct. 9, 1951 r SATTERFIELD 2,570,725

DETACHABLE CHAIR BOTTOM Filed Feb. l, 1950 2 Sheets-Sheet 2 Fig. 5 Isaac Saffezfield By 7 I w m,

Inventor Patented Oct. 9, 1951 V UNITED STATES PATENT OFFICE 2,570,725 l 'DETACHABLE CHAIR BOTTOM Isaac Satterfield, Cedar Grove, N. 0. Application February 1, Serial No. 141,694 r 7 Claims. (01. 155-187) This invention relates to detachable chair bottoms, and more particularly pertains to the novel means provided for detachably securing a pliable sheet of material to the legs and side rails of a conventional chair.

The primary object of this invention is to enable a person to swiftly and eflicaciously secure a chair bottom to the side rails and legs of a conventional chair while properly tensioning the same.

Another important object of this invention is to adjust a chair seat to conform to the dimension of the frame. I

Still another important object of this invention is to detachably secure a flexible chair bottom on the chair frame in such a manner that it may be conveniently secured or removed and may be easily adjusted after attachment. 7

A further object of this invention is to provide a chair bottom formed from a plurality of intertwined and interwoven flexible members and to provide means for adjustably and removably afiixing the seat on a chair frame to form a sturdy and yet conformable chair bottom.

A meritorious feature of the present invention resides in the provision of rows of loops adjacent a marginal portion which may be laced beneath a side rail to secure the chair bottom thereto.

Another important feature of the present invention resides in the provision of a stiffening bar of sufficient length so as to engage behind an adjacent pair of legs.

A final feature to be specifically enumerated herein resides in the flexible construction of the I chair bottom which permits the same to be readily adapted to chair frames of varying size.

preferred embodiment of which-has been illustrated by way of example only in the accompanying drawings, wherein:

Figure 1 is a top plan view of the detachable chair bottom with parts being broken away and showing the same attached to a conventional chair, portions of the chair being shown in sections; I

Figure 2 is a bottom plan view of the detachable chair bottom with parts being broken away and showing the same attached to a conventional chair, portions of the chair being shown in section;

Figure 3 is a bottom plan view of the detachable chair bottom with parts being broken away and showing the same detached with the tensioning cords being broken away and the lacing cord not shown;

Figure 4 is a vertical sectional view illustrating the function of the tension cords, and being 2 taken substantially upon the plane of the section line 4--4 of Figure 2; and,

Figure 5 is a fragmentary vertical sectional detail view taken substantially upon the plane of the section line 55 of Figure 2, and illustrating the manner by which stiffening members are secured to the underside of the chair bottom.

Reference is now made more specifically to the accompanying drawings, wherein like numerals designate similar parts throughout the various views, and in which the numeral I0 designates the detachable chair bottom generally.

As best shown in Figure 3, the chair bottom I0 comprises a sheet of pliable material formed of woven cord or the like that is woven in such a manner that a bar [2 is received within loops formed at one end of the sheet by the sheet cords, with the other end of the warp terminating in loops l4 formed by the warp cords. The weft cords are formed into loops at the opposite sides of the sheet which receive stiffening members It. In addition, a portion of the weft cords are woven so as to form a row of loops I8, which are spaced inwardly from the row of loops l4 and defining a marginal portion 20 therebetween.

It is also to be noted that the weft cords are of such a length as to define lateral extensions 22 from the main body of woven material, and that a rearward extension 24 of woven material is also formed that terminates at the bar I2.

A pair of eyes 26 are secured to one of the members l6, and to each is secured a tightening or securing cord 28. A second pair of eyes 30 are similarly secured to the other member l6 for a purpose to be presently set forth.

Additional stiffening members 32 and 34 are secured to the underside of the chair bottom It, the member 32 being secured to the marginal portion 20 adjacent the loops I8 and parallel with the member 34 which is spaced inwardly from the bar [2. As shown in Figure 5, the members 32 and 34 are preferably attached to the woven material by means of staples 36 that are driven into the member 34 so as to embrace the 1 warp cords 38.

, It is believed that the method by which the detachable chair bottom 10 is secured to a chair frame will be readily understood. As shown in Figures 1, 2, and 4, a conventional chair frame includes front legs 40 and rear legs 42, the frontlegs 40 being connected by a front-rail 44 and rear leg 42 by a rear rail 46, while adjacent front and rear legs are connected by a pair of side rails 48. In attaching the device to a chair frame, the chair bottom I0 is placed on the rails of the chair so that the extension 24 drapes over the rear rail 46, whereupon the bar I2 is extended obliquely through and behind the rear legs 42. As =c1ear1y shown in Figures 2 and 3 the bar l2 has beveled ends 50 and is of such a length as to ,be engaged behind the legs 42 when parallel to the side rails 46. The extensions 22 are then folded about the side rails 48, as shown in Figure 4, and the tension cord 23 is passed through the eye 30 and is folded back and tensioned and tied to the eye 26 as at 52, thus through the stiffening members I6 tensioning the weft cords 56 across the space between the side rails 48.

The marginal portion 20 is then folded about the side rail id and the loops I4 snare are then laced together by a lacing .cord 58, which hasone end secured to the side rail 48 and the other end knotted to a loop 14 as shown at El] and 62 respectively.

In addition to the extreme ease and rapidity with which the detachable chair bottom II! may be attached to a chair frame, the instant invention possesses numerous advantages. The construction herein disclosed, while of a given size is inherently capable of being attached and properly tensioned to'chair frames of varying size. Obviously, the chair bottom I may be fabricated at a point remote from the chair frame to which it is to be attached. It is self-evident that the final step of lacing will produce great tension in a woven material and will present a chair bottom that will not sag excessively upon seating a person on the same.

Another advantage of the present invention resides in the ease of which the material may be retensioned, that is, simply by drawing the lacing cord 58 taut. Of course, even greater tension may be obtained in the chair bottom I0 by applying such a material as airplane dope thereto, which is frequently used in the aircraft industry for producing a high degree of tautness in fabrics.

It will be understood that additional means could be provided for extending the bar I2 to further increase the variation in size of the chair frame to which the chair bottom could be applied. However, it has been found sufiicient in practice to simply make the bar I2 of considerable length initially and to simply cut the same down in length if necessary during installation. The latter mentioned arrangement being entirely satisfactory, since it is only necessary that the bar I2 be greater in length than the distance between the legs 42.

From the foregoing, the construction and oper-. ation of the device may be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art after a consideration of the foregoing specification and accompanying drawings, it is not desired to limit the invention to the exact construction shown and described, but all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

Having described the claimed as new is:

1. For use with a chair having legs connected by front, rear, and side, rails, a detachable chair bottom comprising a sheet of pliable material having a marginal portion adapted to overlie the front rail, rows of loops formed along opposite sides of said marginal portion, a lacing member connecting said rows of loops for retaining said marginal portion in folded relation about the front rail, and means for securing the sheet to the rear and side rails.

2. For use with a chair having legs connected by front, rear, and side rails, a detachable chair invention, what is bottom comprising a sheet of pliable material having a marginal portion adapted to overlie the front rail, rows of loops formed along opposite sides of said marginal portion, a lacing. member connecting said rows of loops for retaining said marginal portion in folded relation about the front rail, a bar secured to an edge of said sheet opposite said marginal portion, said bar having ends engageable behind chair legs and adapted to retain said sheet in folded relation about the rear rail.

3. For use with .a chair having legs connected by front, rear, and side rails, a detachable chair bottom comprising a sheet of flexible material having a marginal portion adapted to overlie the front rail, rows of loops formed along opposite sides of said marginal portion, a lacing member connecting said rows of loops for securing said marginal portion to the front rail, a bar secured to an edge of said sheet opposite said marginal portion, said bar having ends engageable behind chair legs and adapted to retain said sheet in folded relation about the rear rail, a pair of stiffening members secured to opposite edges of said sheet, and means connecting said stiffening members and adapted to retain said sheet in a position te-nsioned across the side rails.

4. For use with a chair having legs connected by front, rear, and side rails, a detachable chair bottom comprising a sheet of pliable material having a marginal portion adapted to overlie the front rail, rows of loops formed along opposite sides of said marginal portion, a lacing member connecting said rows of loops for securing said marginal portion to the front rail, a pair of stiffening members secured to opposite edges of said sheet, and means connecting said stiffening members and adapted to retain said sheet in a position tensioned over the side rails, and means for securing the sheet over the rear rail.

5. The combination of claim 2 including a stiffening member received between said loops and marginal portion for tensioning and stiffening said sheet.

6. In a detachable chair bottom, a substantially rectangular sheet of flexible material having front, rear, and side edges, a pair of stiffening members secured to the sheet along the side edges thereof, an elongated bar secured to the sheet along the rear edge thereof, a series of loops secured to the sheet along the front edge thereof and a second series of loops secured to an intermediate portion of the sheet in inwar ly Spaced parallel relation to the first mentioned series of loops, and means for securing the loops of one of the series to the loops of the other series.

'7. In a detachable chair bottom, a sheet of woven material having an edge perpendicular to the warp of the material, loops formed in the warp along said edge of the material, loops formed in the weft that depend from the sheet of material along a line spaced inwardly from and parallel to said edge, and means for securing the first mentioned loops to the second mentioned loops, whereby a chair rail may be secured between the loops and below the sheet.

ISAAC SATTERFIELD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS me Dat 

